Hawaiian Islands Satellite Interpretation Message
Mon, 27 Sep 2010 19:30:00 -0500
Based on data through 0000 UTC September 28 2010.
Water vapor imagery shows an upper level trough centered near 20°N 167°W or 500 miles west southwest of the main Hawaiian islands. This trough is moving west at 20 mph. An upper level jet on the southeast side of the trough is lifting high level moisture north from the tropics across the area south of 20°N between the trough and 150°W. An upper ridge dominates the area from the Hawaiian islands east.
A large frontal cloud band stretches across the northern portion of the area. The 200 mile wide cloud band stretches from 30°N 153°W to 27°N 160°W to 25°N 170°W to 27°N 180°, crossing the northwest Hawaiian islands between French Frigate Shoals and lisianski. The clouds with this band are mainly low topped cumulus with highest tops near 12000 feet. About 250 miles south of the main cloud band there is another narrower cloud band which eventually merges with the main frontal band near 30°N. North of the frontal band, broken cold air cumulus covers the region.
Scattered thunderstorms are found embedded in broken cloud layers along the intertropical convergence zone south of 13°N between 150°W and 170°W. Highest cloud tops are near 50000 feet.
Over the main Hawaiian islands, broken low clouds are covering the Big Island slopes below 9000 feet and across the coasts except Puna district and South Point which are mostly clear. Broken low clouds covers all of the interior of the smaller islands, except the Koolau mountains of Oahu and the windward Oahu coast, and the eastern and southern Kauai coast where skies are mostly clear. Scattered low clouds are found over the coastal waters surrounding the Big Island with mainly clear skies elsewhere over the coastal waters. Clouds are moving west at 5 to 10 mph in areas free of terrain.
BRENCHLEY
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